I've always wanted to go to the Wulff School of Fly Fishing in Livingston Manor, run by Joan Wulff herself- a legend of fly fishing and the widow of famed angler and author Lee Wulff. I know people who have taken the two day course and they just raved about it. It's on the bucket list for me, but in the meantime, the next best thing is this new free online series of casting instruction videos from Winston Rods starring Joan Wolff herself. I'm a s̶l̶o̶p̶p̶y̶ self taught caster, so I'm really looking forward to watching these and hopefully improving my technique.
Check it out.